/**
*      author: Y_Yao
*      created: 2025-04-18 17:13:38
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 9e18;
const int INF = 0x3f3f3f3f;
string s;
int ans = 0;
void dfs(int sum ,int cur)
{
    
}

void solve()
{
   cin >> s;
   int n = s.size();
   dfs(0,0);
   cout << ans << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    // cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}